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Graphene nanocomposites for electrochemical cell electrodes

United States Patent

9,190,667
November 17, 2015
View the Complete Patent at the US Patent & Trademark Office
A composite composition for electrochemical cell electrode applications, the composition comprising multiple solid particles, wherein (a) a solid particle is composed of graphene platelets dispersed in or bonded by a first matrix or binder material, wherein the graphene platelets are not obtained from graphitization of the first binder or matrix material; (b) the graphene platelets have a length or width in the range of 10 nm to 10 .mu.m; (c) the multiple solid particles are bonded by a second binder material; and (d) the first or second binder material is selected from a polymer, polymeric carbon, amorphous carbon, metal, glass, ceramic, oxide, organic material, or a combination thereof. For a lithium ion battery anode application, the first binder or matrix material is preferably amorphous carbon or polymeric carbon. Such a composite composition provides a high anode capacity and good cycling response. For a supercapacitor electrode application, the solid particles preferably have meso-scale pores therein to accommodate electrolyte.
Zhamu; Aruna (Centerville, OH), Jang; Bor Z. (Centerville, OH), Shi; Jinjun (Columbus, OH)
Nanotek Instruments, Inc. (Dayton, OH)
12/ 220,651
20100021819
July 28, 2008
This invention is based on the research result of a US Department of Energy (DOE) Small Business Innovation Research (SBIR) project. The US government has certain rights on this invention.